Medicine
2 years ago

Frozen embryos with high-grade Day 6 blastocysts outperform low-grade Day 5 in live births

Research Square (Research Square)
Live birth rate following frozen-thawed blastocyst transfer is higher in high-grade Day 6 blastocyst than low-grade Day 5 blastocyst
Wenhao Shi, Hanying Zhou, Bin Meng, Hui Wang, Xia Xue, Na Li, Juanzi Shi

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The study found that transferring high-grade Day 6 blastocysts resulted in a higher live birth rate compared to low-grade Day 5 blastocysts. The live birth rate was highest for high-grade Day 5 blastocysts and lowest for low-grade Day 6 blastocysts. High-grade Day 6 blastocysts also had a higher rate of normal chromosome numbers compared to low-grade Day 5 blastocysts. This suggests that choosing high-quality Day 6 blastocysts may lead to a higher chance of successful pregnancy.